What color is the backpad and the seats in your yellow car ? Are they Brown, Tan/cinnamon or Black ?
I think if they are brown, the carpets were brown as well.The color in the picture is often found at the tan/cinnamon colored backpads.
But I guess you could get any combi you wanted a a buyer at the dealer if you wanted your own flavour.
Plus there are people on this forum that have better history/originality knowledge, so do not use my answer as the correct one immediately.
There is also a forum part about originality vs interiors...did you already check that:
http://www.914world.com/bbs2/index.php?showtopic=58444And...welcome !